remove obsolete version check from backend.php

backend.php

@@ -41,18 +41,6 @@
 		pg_query("set client_encoding = 'utf-8'");
 	}
 
-/*
-	$result = db_query($link, "SELECT schema_version FROM ttrss_version");
-
-	$schema_version = db_fetch_result($result, 0, "schema_version");
-
-	if ($schema_version != SCHEMA_VERSION) {
-		print "Error: database schema is invalid
-			(got version $schema_version; expected ".SCHEMA_VERSION.")";
-		return;
-	}
-*/
-
 	$fetch = $_GET["fetch"];
 
 	/* FIXME this needs reworking */